Right signal slow/no-go

[SanRafaelFaz]

Greetings:

I've been messing around with an additional 12V (cig) plug for my Sat radio, etc. Tapped into the lighter power and everything seemed fine...until I apply the brakes while the right turn signal is on. It will either cease to blink, or will slow way down in flash speed. If I have either the parking lights or main lights on, the rt sig will not work at all, brakes applied or not. It makes no difference whether I have anything plugged into the new socket or not. Flashers work as normal. FYI, I touched nothing relating to signals or flashers. No other electrical problems or symptoms Grounds look to be intact, though my right rear light assembly is a bit dim in all modes. Something in the light housing, maybe?
TIA!

[vandor]

Sounds like a bad ground at the right taillight.